package org.example.news.controller;

import jakarta.validation.constraints.Pattern;
import org.example.news.pojo.Result;
import org.example.news.pojo.User;
import org.example.news.service.UserService;
import org.example.news.utils.JwtUtil;
import org.example.news.utils.Md5Util;
import org.example.news.utils.ThreadLocalUtil;
import org.hibernate.validator.constraints.URL;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.util.StringUtils;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

import javax.sql.rowset.spi.SyncResolver;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@RestController
@Validated   //参数校验
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserService userService;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    //注册用户
    @PostMapping("/register")
    public Result register(@Pattern(regexp = "^\\S{1,16}$") String username, @Pattern(regexp = "^\\S{5,16}$") String password) {
        //查询用户
        User u = userService.findByUserName(username);
        if (u == null) {
            //没有占用用户名
            //注册
            userService.register(username, password);
            return Result.success();
        } else {
            //占用了
            return Result.error("用户名已经重复了，请换一个用户名！");
        }

    }

    //登录用户
    @PostMapping("/login")
    public Result<String> login(@Pattern(regexp = "^\\S{1,16}$") String username, @Pattern(regexp = "^\\S{5,16}$") String password) {
        //根据用户名查询用户
        User loginUser = userService.findByUserName(username);
        //判断用户是否存在
        if (username == null) {
            return Result.error("用户不存在");
        }
        //判断密码是否正确
        if (Md5Util.getMD5String(password).equals(loginUser.getPassword())) {
            //登录成功
            Map<String, Object> claims = new HashMap<>();
            claims.put("id", loginUser.getId());
            claims.put("username", loginUser.getUsername());
            String token = JwtUtil.genToken(claims);
            //把token存储到redis中
            ValueOperations<String,String>  operations=stringRedisTemplate.opsForValue();
            operations.set(token,token,1, TimeUnit.HOURS);


            return Result.success(token);
        }

        return Result.error("密码错误");
    }

    //获取用户详细信息
    @GetMapping("/userInfo")
    public Result<User> userInfo() {
        //根据用户名查询用户
        Map<String, Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User user = userService.findByUserName(username);
        return Result.success(user);
    }

    //更新用户基本信息
    @PutMapping("/update")
    public Result update(@RequestBody @Validated User user) {
        userService.update(user);
        return Result.success();

    }


    //更新用户头像
    @PatchMapping("/updateAvatar")
    public Result updateAvatar(@RequestParam @URL String avatarUrl) {
        userService.updateAvatar(avatarUrl);
        return Result.success();

    }


    //修改用户密码
    @PatchMapping("/updatePwd")
    public Result updatePwd(@RequestBody Map<String,String> params ,@RequestHeader("Authorization") String token){
        // 1、校验参数
        String oldPwd=params.get("old_pwd");
        String newPwd=params.get("new_pwd");
        String rePwd=params.get("re_pwd");
        if (!StringUtils.hasLength(oldPwd)  || !StringUtils.hasLength(newPwd)  ||!StringUtils.hasLength(rePwd)) {
            return Result.error("缺少必要的数据");
        }
            //判断原密码是否正确
            //调用userService根据用户名获取到原来的密码，和oldpwd比较
            Map<String,Object> map=ThreadLocalUtil.get();
            String username= (String) map.get("username");
            User loginUser=userService.findByUserName(username);

            if( !loginUser.getPassword().equals((Md5Util.getMD5String(oldPwd)))){
                return Result.error("原密码错误！");
            }

            //newPwd和rePwd是否一样
            if(!rePwd.equals(newPwd)){
                return Result.error("两次填写的新密码不一致！") ;
            }

            //2、调用service完成密码更新
            userService.updatePwd(newPwd);
            //删除redis中对应的token
        ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
        operations.getOperations().delete(token);
        return Result.success();
        }
    }



